Answer:
1) No.
2) Yes "3x + y = 2".
3) Yes "5x - y = -4".
4) Yes "2x - y = -5".
5) Yes "6x - y = 7".
6) No.
7) Yes "y = 4".
8) Yes "2x + 6y = 2".
9) Yes "y = 2".
Explanation:
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